Well I guess I've made one to manny errors? I'd forgotten the input needed to be switched to mono as well as the power amp.I find having the two switches for input- stereo/mono and line out- pre/post confusing. Having to do the gig I ran only one side in Stereo mode this may have made matters worse. I will use it in Stereo for the next gig with an extra cab. I had blown the fuse in my Eden 2X10XLT and may have burnt something else. I was using the banana plug to speakon. I surprising how easily you can use 600+ watts when you rockin. I thought the Eden could handle it if it was clean power. I may need to wire it to 16 ohms instead of 4 ohms? Or chage the speakers to make an 8ohm cab.I guess I learn the hard way.